Ruzivo rwekutanga rwevashandisi
Kambani yekukanda vharafu yegedhi inonyanya kugadzira zvigadzirwa zvevharuvhu.Midziyo yekugadzira yekambani iyi inosanganisira tani imwe yepakati-frequency induction furnace, inoshandisa 2000 kVA (10KV/0.75 kVA) tekinoroji inoshandura magetsi emagetsi system, uye ine maviri capacitor muripo makabati ane huwandu hwe600 kVA, a. one-ton medium-frequency induction furnace, 800 kVA (10KV/0.4 kVA) technical professional transformer power supply system, capacitor compensation cabinet ine volume ye300 kVA.Iyo dhizaini yemagetsi system dhizaini ndeiyi inotevera:
Simba rinoratidzika repakati frequency induction furnace ine 2000KVA transformer iri 700KVA-2100KVA, iro rinoshanda simba P=280KW-1930KW, iro rinoshanda mutoro iri Q=687KAR-830KAR, simba chinhu PF=0.4-0.92, uye ikozvino mukushandaⅰ = 538 A-1660 A, iro rinoonekwa simba repakati frequency induction furnace ine 800KVA transformer i200KVA-836KVA.Simba rinoshanda iP = 60KW-750KW, iyo reactive load ndeye Q=190KAR-360KAR, iyo simba chinhu PF = 0.3-0.9, uye kushanda ikozvino i = 288 A-1200 A. Nokuti iyo capacitor compensation cabinet haigoni kuiswa mukushanda (otomatiki muripo unotadza, kana capacitor ichiiswa pamaoko, ruzha rwecapacitor haruna kujaira, rwendo rwedunhu rinopwanya, capacitor yakarongedzerwa, mafuta akadonhedza, akatsemuka, uye haagone kushandiswa), iyo mwedzi nemwedzi simba rakakwana. PF = 0.78, uye mubereko wepamwedzi wemortgage inogadziridzwa kusvika kudarika 32,000 yuan.
Simba System Situation Analysis
Iyo yakakosha mutoro weyakagadziridzwa simba rekupa yepakati frequency induction choto nhanhatu single pulse ballasts.Mudziyo wekugadziridza unoburitsa akawanda maharmonics painoshandura AC ikozvino kuDC, inova inowanzoitika sosi yeharmonics.Iyo harmonic yazvino inounzwa mugedhi remagetsi inokonzeresa harmonic kushanda voltage pane hunhu impedance yegidhi remagetsi, zvichiita kuti furemu irasikirwe nemagetsi ekushanda uye yazvino yegidhi remagetsi, ichiisa mungozi kunaka uye kuchengetedzwa kwekushanda kweiyo magetsi system, kuwedzera. kurasikirwa kwemutsara uye kutsauka kwemagetsi ekushanda, uye kukonzera kukuvadza kune girasi remagetsi uye kugadzirisa Iyo fekitari pachayo magetsi emagetsi achakonzera njodzi dzakaipa.Kana iyo reactive power compensation capacitor bank inoiswa mukushanda, nekuti harmonic hunhu impedance yebhangi capacitor idiki, nhamba huru yeharmonics inounzwa mubhangi recapacitor, uye iyo capacitance ikozvino inowedzera nekukurumidza, ichikanganisa zvakanyanya hupenyu hwesevhisi.Kune rimwe divi, kana iyo harmonic capacitive reactance ye capacitor bank yakaenzana neyakaenzana harmonic inductive reactance yehurongwa uye nhevedzano resonance inoitika, iyo harmonic ikozvino yakawedzera zvakanyanya (2-10 nguva), zvichikonzera kupisa uye kukuvadza iyo capacitor.Uye zvakare, iyo harmonics ichaita kuti iyo DC sinusoidal wave ichinje, zvichikonzera sawtooth peak wave, izvo zviri nyore kukonzeresa kusarura kwechikamu mune insulating zvinhu.Kubuda kwenguva refu kwechikamu kunosimudzirawo kuchembera kwezvinhu zvinodzivirira uye kukonzeresa kukuvara kwecapacitor nyore.Naizvozvo, iyo capacitor reactive power compensation cabinet haigone kushandiswa kubhadharisa yepakati frequency induction furnace, uye sefa reactive simba rekubhadhara mudziyo une pulse ikozvino kudzvinyirira basa rinofanira kusarudzwa.
Reactive simba muripo wekurapa chirongwa
Zvinangwa zveutongi
Sefa muripo wemidziyo yakagadzirirwa kusangana nezvinodiwa zvekudzora kudzvinyirira kweharmonics uye reactive simba.
Mune maitiro ekushanda e0.75KV uye 0.4KV masisitimu, mushure mekunge sefa yemuripo wemidziyo yabva mufekitori, maharmonics epamusoro anodzvanywa pamwedzi wepakati simba chinhu che0.95 kana kupfuura.
Iko kupinza kwesefa yekubhadhara loop hakuzokonzerese pulse current resonance kana resonance overvoltage uye overcurrent.
Dhizaini Inotevera Mitemo
Hunhu hwesimba Public grid harmonics GB/T14519-1993
Simba remhando Voltage fluctuation uye flicker GB12326-2000
General tekinoroji mamiriro eyakaderera-voltage reactive simba muripo mudziyo GB/T 15576-1995
Low-voltage reactive power compensation device JB/T 7115-1993
Reactive simba muripo wehunyanzvi mamiriro;JB/T9663-1999 "Low-voltage reactive power automatic compensation controller" Harmonic current limit value ye low-voltage magetsi nemagetsi midziyo;GB/T 17625.7-1998
Electrotechnical mazwi Simba capacitors GB/T 2900.16-1996
Low voltage shunt capacitor GB/T 3983.1-1989
Reactor GB10229-88
Reactor IEC 289-88
Low-voltage reactive power compensation controller order tekinoroji mamiriro DL/T597-1996
Low-voltage magetsi enclosure giredhi yekudzivirira GB5013.1-1997
Yakaderera-voltage yakakwana switchgear uye kudzora midziyo GB7251.1-1997
Mazano ekugadzira
Zvinoenderana nemamiriro ezvinhu ekambani, kambani yedu yakagadzira seti yakadzama yepakati frequency induction furnace reactive power compensation filter scheme.Nyatsofunga nezvesimba remutoro chinhu uye kudzvanyirirwa kweharmonic, uye isa seti yeyakaderera-voltage reactive simba muripo mafirita padivi revoltage padivi rekambani 0.75KV uye 0.4KV matransformer kudzvanyirira maharmonics, kubhadhara reactive simba, uye kugadzirisa simba chinhu.Munguva yekushanda kwechoto chepakati chefuru, mudziyo wekugadzirisa unogadzira 6K + 1 harmonics, uye Fourier series inoshandiswa kuora uye kushandura ikozvino kuti ibudise 5 harmonics ye250HZ uye 7 harmonics pamusoro pe350HZ.Naizvozvo, mukugadzirwa kweyepakati frequency induction furnace firita reactive simba muripo, iyo frequency ye250HZ, 350HZ uye yakatenderedza inofanirwa kugadzirwa kuti ive nechokwadi chekuti sefa yekubhadhara loop inogona kudzvanya pulse ikozvino uku ichibhadhara reactive reme uye kugadzirisa simba chinhu.
dhizaini basa
Iyo yakazara simba chinhu che2-ton yepakati frequency induction furnace inofananidzwa ne2000 kVA transformer inobhadharwa kubva pa0.78 kusvika 0.95.Chishandiso chemuripo wesefa chinoda kuve chakashongedzerwa nehuremu hwe820 kVA, uye chinoshandura otomatiki kuita mapoka matanhatu ehunyanzvi, rimwe nerimwe richienderana nemhepo iri pazasi voltage padivi retransformer kuti muripo.Iyo giredhi giredhi gadziriso inokwana 60KVAR, iyo inogona kusangana akasiyana emagetsi zvinodiwa zvepakati frequency induction choto.Iyo yakazara simba chinhu che 1 ton yepakati frequency induction furnace inofananidzwa ne800 kVA transformer inobhadharwa kubva 0.78 kusvika 0.95.Iyo sefa yemuripo wemidziyo inoda kuve yakashongedzerwa nehuremu hwe360 kVA, iyo inogona kushandurwa otomatiki kuita 6 mapoka ehukuru, uye iyo yakagadziridzwa giredhi dhizaini i50 kVA, iyo inogona kusangana neakasiyana emagetsi zvinodiwa zvepakati frequency induction choto.Iyi mhando yedhizaini inovimbisa zvizere kuti iyo yakagadziriswa simba chinhu yakakwira kupfuura 0.95.
Effect analysis mushure mekuiswa kwefirita muripo
Mukutanga kwaChikumi 2010, iyo yepakati frequency furnace sefa reactive simba rekubhadhara mudziyo yakaiswa uye yakaiswa mukushanda.Midziyo yacho inoteedzera kuchinja kwemutoro wepakati frequency induction furnace, inobhadhara zvakanyanya reactive mutoro, uye inovandudza simba chinhu.mashoko sezvinotevera:
Mushure mesefa yemuripo mudziyo wabatidzwa, simba rekuchinja curve rinenge 0.97 (simba remagetsi kana mudziyo wemuripo wesefa wagurwa ungangoita 0.8)
Rodha kushanda
Ikozvino ye2000KVA transformer yakaderedzwa kubva ku1530A kusvika ku1210A, kuderera kwe21%;iyo ikozvino ye800KVA transformer yakaderedzwa kubva ku1140A kusvika ku920A, kuderera kwe19.3%, iyo yakaenzana ne20% kuderedzwa kweshanduro, kureva, 560KVA, uye kukuvara kwesimba rinobuda mushure mekubhadhara kunoderedzwa ne21%.;Transformer kukanganisa kwakaderedzwa neWT=?Pd1S2) 2**[1-(1-1/cos2)2]=24{(0.78?2800)/280}20.415(kwh).Kurasikirwa kwetransformer ndeye 24 yuan, uye kurasikirwa kwepamwedzi ndeye 15KW = 150d;mari yekuchengeta pamwedzi i1580d=230d*30d(2307){0.782800}20d.
simba factor situation
Mwedzi uno, simba resimba rekambani rakawedzera kubva pa0.78 kusvika pa0.97, chiyero chemwedzi nemwedzi chinoshandiswa uye mabhiri ekushandisa akagadziridzwa kuita 0, uye chirango chakashandurwa kuita 4,680 yuan.Kubva ipapo, simba remwedzi nemwedzi rakaramba riri pa 0.97-0.98, uye mubairo wepamwedzi wave uri pakati pe3,000-5,000 yuan.
Kazhinji, chigadzirwa ichi chine kugona kwakanakisa kudzvanya pulse ikozvino uye kubhadhara reactive simba, kugadzirisa dambudziko rekambani renguva refu rekubereka mubereko uye zvirango zvekushandisa, kuvandudza kugona kwekubuda kwevashanduri, uye kuunza zviri pachena hupfumi kukambani , Yakadzorerwa. mari yemutengi isingasviki gore.Naizvozvo, iyo reactive simba muripo weiyo yepakati frequency furnace inogadzirwa nekambani inogutsa kwazvo, uye inokwezva vatengi vazhinji mune ramangwana.
Nguva yekutumira: Kubvumbi-14-2023